Liquid crystal display panel and display apparatus using the same

ABSTRACT

In a liquid crystal display (LCD) panel of the present invention, a second substrate comprises a second electrode, wherein the second electrode comprises a trunk portion and plurality of branch portions, and there is a first predetermined angle and a second predetermined angle between the trunk portion and the branch portions, and the predetermined angle is less than or greater than 45 degrees. Quarter wave retarder films are bonded to outer surfaces of a first substrate and the second substrate, respectively. The present invention can improve the color shift problem and the transmittance of the LCD panel.

FIELD OF THE INVENTION

The present invention relates to a field of a liquid crystal displaytechnology, and more particularly to a liquid crystal display (LCD)panel and a display apparatus using the same.

BACKGROUND OF THE INVENTION

Liquid crystal displays (LCDs) have been widely applied in electricalproducts. Currently, most of LCDs are backlight type LCDs which comprisea liquid crystal panel and a backlight module. The liquid crystal panelis composed of two transparent substrates and a liquid crystal sealedthere-between.

At present, a vertical alignment (VA) technology has been developed forLCD panels. For example, a polymer stabilized vertical alignment (PSVA)type liquid crystal display panel which is made using apolymer-stabilized alignment (PSA) process, can have some advantages,such as wide viewing angle, high aperture ratio, high contrast andsimple process.

In the PSVA type LCD, reactive monomers can be doped in the liquidcrystal between the two transparent substrates and mixed with liquidcrystal molecules, wherein the a polyimide (PI) is coated on the surfaceof each of the transparent substrates to be an alignment layer.Subsequently, when applying a voltage and irradiating an ultraviolet(UV) light to the two transparent substrates, a phase separation arisesin the reactive monomers and the liquid crystal molecules, and a polymeris formed on the alignment layer of the transparent substrate. Theliquid crystal molecules are oriented along a direction of the polymerdue to the interaction between the polymer and the liquid crystalmolecules. Therefore, the liquid crystal molecules between thetransparent substrates can have a pre-tilt angle.

However, currently, a color shift problem is likely to occur in the VAtype LCD, hence deteriorating the display quality of the LCD. Forimproving the above-mentioned color shift problem, a pixel structure ofthe LCD panel may be varied, but the variation of the pixel structuremay result in a reduction of a transmittance of the LCD panel.

As a result, it is necessary to provide an LCD panel and a displayapparatus using the same to solve the problems existing in theconventional technologies, as described above.

SUMMARY OF THE INVENTION

The present invention provides an LCD panel and a display apparatususing the same to solve the color shift problem and the transmittanceproblem of the VA type LCD.

A primary object of the present invention is to provide a liquid crystaldisplay panel, and the liquid crystal display panel comprises: a firstsubstrate comprising a first electrode; a second substrate comprising asecond electrode, first pixel regions, second pixel regions and thirdpixel regions, wherein the second electrode has a pixel electrodestructure, and the pixel electrode structure comprises a trunk portionand plurality of branch portions, and there is a first predeterminedangle between the trunk portion and the branch portions in each of thefirst pixel regions, and there is a second predetermined angle betweenthe trunk portion and the branch portions in each of the second pixelregions, and there is a third predetermined angle between the trunkportion and the branch portions in each of the third pixel regions, andthe first predetermined angle and the second predetermined angle areless than or greater than 45 degrees, and the first predetermined angleis different to the second predetermined angle, and the thirdpredetermined angle is different to the first predetermined angle andthe second predetermined angle; a liquid crystal layer formed betweenthe first substrate and the second substrate; a first polarizer disposedat an outer side of the first substrate; a second polarizer disposed atan outer side of the second substrate; a first quarter wave retarderfilm disposed between the first substrate and the first polarizer; and asecond quarter wave retarder film disposed between the second substrateand the second polarizer, wherein an angle between the slow axis of thefirst quarter wave retarder film and an absorption axis of the firstpolarizer is 45 degrees, and an angle between the slow axis of thesecond quarter wave retarder film and an absorption axis of the secondpolarizer is 45 degrees.

In one embodiment of the present invention, the second substrate furthercomprises fourth pixel regions, and there is a fourth predeterminedangle in the fourth pixel regions, and the fourth predetermined angle isdifferent the first predetermined angle, the second predetermined angleand the third predetermined angle.

In one embodiment of the present invention, the predetermined angle isin the range of 5 degrees to 42.5 degrees.

In one embodiment of the present invention, the predetermined angle isin the range of 10 degrees to 40 degrees.

In one embodiment of the present invention, the predetermined angle isin the range of 47.5 degrees to 85 degrees.

In one embodiment of the present invention, the predetermined angle isin the range of 50 degrees to 80 degrees.

In one embodiment of the present invention, an angle between slow axesof the first quarter wave retarder film and the second quarter waveretarder film is 90 degrees.

Another object of the present invention is to provide a liquid crystaldisplay panel, and the liquid crystal display panel comprises: a firstsubstrate comprising a first electrode; a second substrate comprising asecond electrode, first pixel regions, and second pixel regions, whereinthe second electrode has a pixel electrode structure, and the pixelelectrode structure comprises a trunk portion and plurality of branchportions, and there is a first predetermined angle between the trunkportion and the branch portions in each of the first pixel regions, andthere is a second predetermined angle between the trunk portion and thebranch portions in each of the second pixel regions, and the firstpredetermined angle and the second predetermined angle are less than orgreater than 45 degrees, and the first predetermined angle is differentto the second predetermined angle; a liquid crystal layer formed betweenthe first substrate and the second substrate; a first polarizer disposedat an outer side of the first substrate; a second polarizer disposed atan outer side of the second substrate; a first quarter wave retarderfilm disposed between the first substrate and the first polarizer; and asecond quarter wave retarder film disposed between the second substrateand the second polarizer.

In one embodiment of the present invention, the second substrate furthercomprises third pixel regions, and there is a third predetermined anglebetween the trunk portion and the branch portions in the third pixelregions, and the third predetermined angle is different to the firstpredetermined angle and the second predetermined angle.

In one embodiment of the present invention, the second substrate furthercomprises fourth pixel regions, and there is a fourth predeterminedangle in the fourth pixel regions, and the fourth predetermined angle isdifferent the first predetermined angle, the second predetermined angleand the third predetermined angle.

In one embodiment of the present invention, the predetermined angle isin the range of 5 degrees to 42.5 degrees.

In one embodiment of the present invention, the predetermined angle isin the range of 10 degrees to 40 degrees.

In one embodiment of the present invention, the predetermined angle isin the range of 47.5 degrees to 85 degrees.

In one embodiment of the present invention, the predetermined angle isin the range of 50 degrees to 80 degrees.

In one embodiment of the present invention, an angle between slow axesof the first quarter wave retarder film and the second quarter waveretarder film is 90 degrees, and an angle between the slow axis of thefirst quarter wave retarder film and an absorption axis of the firstpolarizer is 45 degrees, and an angle between the slow axis of thesecond quarter wave retarder film and an absorption axis of the secondpolarizer is 45 degrees.

In the LCD panel and the display apparatus using the same of the presentinvention, with the use of the pixel electrode structure, the colorshift problem of the VA type LCD apparatus can be improved. For example,the pixel electrodes in the different pixel regions can have differentpredetermined angles (the angles between the trunk portion and thebranch portions). Moreover, the polarized direction and angles of thelight rays can be adjusted by the λ/4 retarder films for enhancing thetransmittance of the liquid crystal display panel.

The structure and the technical means adopted by the present inventionto achieve the above and other objects can be best understood byreferring to the following detailed description of the preferredembodiments and the accompanying drawings.

DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view showing a liquid crystal display panelaccording to one embodiment of the present invention;

FIG. 2 is a cross-sectional view showing a PSVA type liquid crystaldisplay panel according to one embodiment of the present invention;

FIG. 3 is a schematic diagram showing a pixel region of the liquidcrystal display panel according to one embodiment of the presentinvention;

FIG. 4 is a schematic diagram showing different angles according to oneembodiment of the present invention;

FIG. 5 is a schematic diagram showing polarized light rays according toone embodiment of the present invention; and

FIG. 6 is a schematic diagram showing a pixel region of a liquid crystaldisplay panel according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The following embodiments are referring to the accompanying drawings forexemplifying specific implementable embodiments of the presentinvention. Furthermore, directional terms described by the presentinvention, such as upper, lower, front, back, left, right, inner, outer,side and etc., are only directions by referring to the accompanyingdrawings, and thus the used directional terms are used to describe andunderstand the present invention, but the present invention is notlimited thereto.

In the drawings, structure-like elements are labeled with like referencenumerals.

Referring to FIG. 1, a cross-sectional view showing a liquid crystaldisplay (LCD) panel according to one embodiment of the present inventionis illustrated. The display apparatus of the present embodiment cancomprises the liquid crystal display panel 100 and a backlight module(not shown). The liquid crystal display panel 100 is disposed oppositeto the backlight module, and the backlight module may be realized as aside lighting backlight module or a bottom lighting backlight module toprovide the liquid crystal display panel 100 with the back-light. Theliquid crystal display panel 100 may be a VA type liquid crystal displaypanel, such as a PSVA type liquid crystal display panel or a patternvertical alignment (PVA) type liquid crystal display panel.

Referring to FIG. 1 again, the liquid crystal display panel 100 maycomprise a first substrate 110, a second substrate 120, a liquid crystallayer 130, a first polarizer 140 and a second polarizer 150, a firstquarter wave (λ/4) retarder film 160 and a second λ/4 retarder film 170.The liquid crystal layer 130 is formed between the first substrate 110and the second substrate 120. That is, the liquid crystal layer 130 ispositioned at inner sides of the first substrate 110 and the secondsubstrate 120. The first polarizer 140 is disposed at an outer side ofthe first substrate 110, and the second polarizer 150 is disposed at anouter side of the second substrate 120. The first λ/4 retarder film 160is disposed between the first substrate 110 and the first polarizer 140,and the second λ/4 retarder film 170 is disposed between the secondsubstrate 120 and the second polarizer 150.

Referring to FIG. 1, the first substrate 110 and the second substrate120 may be realized as glass substrates or flexible plastic substrates.The first substrate 110 may be a glass substrate or other materialsubstrate with color filters (CF), and the second substrate 120 may be aglass substrate or other material substrate with a thin film transistor(TFT) array. It notes that the CF and the TFT array may also be disposedon the same substrate in other embodiments.

Referring to FIG. 2, a cross-sectional view showing a PSVA type liquidcrystal display panel according to one embodiment of the presentinvention is illustrated. In this embodiment, the liquid crystal displaypanel 100 may be, for example, a PSVA type liquid crystal display panel.At this time, the liquid crystal layer 130 can include reactive monomersand liquid crystal molecules. The reactive monomers are preferablyphoto-sensitive monomers mixed with the liquid crystal molecules. Thefirst polarizer 140 is disposed on one side of the first substrate 110and opposite to the liquid crystal layer 130 (i.e. a light-emitting sideof the first substrate 110). The second polarizer 150 is disposed on oneside of the second substrate 120 and opposite to the liquid crystallayer 130 (i.e. a light-incident side of the second substrate 120).

Referring to FIG. 2 again, when the liquid crystal display panel 100 isthe PSVA type liquid crystal display panel, the first substrate 110 cancomprise a first electrode 111, a first alignment layer 112 and a firstpolymer alignment layer 113, and the second substrate 120 can comprise asecond electrode 121, a second alignment layer 122 and a second polymeralignment layer 123. The first alignment layer 112 and the first polymeralignment layer 113 are formed on the first electrode 111 in sequence.The second alignment layer 122 and the second polymer alignment layer123 are formed on the second electrode 121 in sequence. The firstelectrode 111 and the second electrode 121 are preferably made of atransparent and electrically conductive material, such as ITO, IZO, AZO,GZO, TCO or ZnO. A voltage can be applied to the liquid crystalmolecules of the liquid crystal layer 130 by the first electrode 111 andthe second electrode 121. In this embodiment, the first electrode 111may be a common electrode, and the second electrode 121 may be a pixelelectrode. In addition, the second electrode 121 can have a plurality ofregions, and the voltage applied to each of the regions may be the sameor different. The alignment layers 112, 122 and the polymer alignmentlayers 113, 123 can have an alignment direction for determining theorientation of the liquid crystal molecules of the liquid crystal layer130. The alignment layers 112, 122 and the polymer alignment layers 113,123 can have a pre-tilt angle, wherein the pre-tilt angle is less than90 degrees, preferably less than 60 degrees. The alignment layers 112,122 are formed on the substrates 110, 120, respectively. The polymeralignment layers 113, 123 are polymerized of the reactive monomersbonded with the alignment layers 112, 122.

Referring to FIG. 3, a schematic diagram showing a pixel region of theliquid crystal display panel according to one embodiment of the presentinvention is illustrated. The second substrate 120 comprises a pluralityof signal lines (not shown), such as gate lines and data lines, whichare crisscrossed, and thereby form a plurality of pixel regions 101arranged in an array. Referring to FIG. 3 again, the pixel regions 101comprise first pixel regions R, second pixel regions G and third pixelregions B. The pixel regions R, G, B may correspond to red, green andblue color filters. In each of the pixel regions 101, the secondelectrode 121 has a pixel electrode structure (or pixel pattern) forforming a multi-domain alignment. In this embodiment, the secondelectrode 121 in each of the pixel regions 101 comprises a trunk portion124 and a plurality of branch portions 125. The trunk portion 124 may bea crisscross pattern, and each of the pixel regions 101 is divided intofour sub-pixel regions 102 by the trunk portion 124. In each of thesub-pixel regions 102, the branch portions 125 obliquely extend from thetrunk portion 124 and are arranged parallel to each other. In this case,there is a predetermined angle θ between the trunk portion and thebranch portions, and the predetermined angle θ is in the range of 0 to90 degrees except 45 degrees. In the embodiment shown in FIG. 3, thepredetermined angle θ is less than 45 degrees.

For example, as shown in FIG. 3, there is a first predetermined angle θ1in the first pixel regions R, and there is a second predetermined angleθ2 in the second pixel regions G, and there is a third predeterminedangle θ3 in the third pixel regions B. The above-mentioned firstpredetermined angle θ1, second predetermined angle θ2 and thirdpredetermined angle θ3 are less than or greater than 45 degrees, and thepredetermined angles θ1, θ2, θ3 are different. For example, as shown inFIG. 3, the first predetermined angle θ1 in the first pixel regions Rmay be 41.5 degrees, and the second predetermined angle θ2 in the secondpixel regions G may be 42 degrees, and the third predetermined angle θ3in the third pixel regions B may be 42.5 degrees. With the use ofdifferent predetermined angles which are less than 45 degrees, the colorshift problem exiting in the VA type LCD apparatus can be greatlyimproved.

In practice, the second substrate 120 may comprise four kinds of pixelregions 101, such as the first pixel regions R, the second pixel regionsG, the third pixel regions B and fourth pixel regions Y (yellow). Thereis a fourth predetermined angle θ4 in the fourth pixel regions. Theabove-mentioned first predetermined angle θ1, second predetermined angleθ2, third predetermined angle θ3 and fourth predetermined angle θ4 aredifferent, respectively, and the similarities are not mentioned forsimplification.

According to an optical theory, when an angle between a tiltingdirection of the liquid crystal molecules and an absorption axis of thepolarizer is 45 degrees, the liquid crystal display panel can have agreatest transmittance. Therefore, in embodiments of the presentinvention, the angle between the tilting direction of the liquid crystalmolecules and an absorption axis of the polarizers 140, 150 is adjusted,so as to enhance the transmittance of the liquid crystal display panel100.

In one embodiment, referring to FIG. 3, the predetermined angle θ (θ1,θ2, and θ3) between the trunk portion 124 and the branch portions 125may be less than 45 degrees (θ<45°), such as in the range of 5 degreesto 42.5 degrees, for another example, in the range of 10 degrees to 40degrees. At this time, the λ/4 retarder films 160 and 170 are bonded tothe outer surfaces of the first substrate 110 and the second substrate120, respectively, so as to adjust polarized angles of the light rays.

Referring to FIG. 4, a schematic diagram showing different anglesaccording to one embodiment of the present invention is illustrated.When the predetermined angle θ between the trunk portion 124 and thebranch portions 125 is less than 45 degrees, the absorption axis of thefirst polarizer 140 may be vertical to the absorption axis of the secondpolarizer 150. That is, an angle between the absorption axes A of thefirst polarizer 140 and the second polarizer 150 is 90 degrees. In thiscase, an angle between slow axes C of the λ/4 retarder films 160 and 170is 90 degrees, and an angle between the axis C of the λ/4 retarder film160 or 170 and the absorption axis A of the polarizer 140 or 150 is 45degrees. That is, the angle between the axis C of the first λ/4 retarderfilm 160 and the absorption axis A of the polarizer 140 or 150 is 45degrees, and the angle between the axis C of the second λ/4 retarderfilm 170 and the absorption axis A of the polarizer 140 or 150 is 45degrees.

Referring to FIG. 5, a schematic diagram showing polarized light raysaccording to one embodiment of the present invention is illustrated.When the light rays are emitted from the second polarizer 150 to thefirst polarizer 140 of the liquid crystal display panel 100, the lightrays from the second polarizer 150 are transformed into left handedcircularly polarized light rays or right handed circularly polarizedlight rays by the second λ/4 retarder film 170. Subsequently, thecircularly polarized light rays are transformed into another kind ofcircularly polarized light rays by the liquid crystal layer 130 (i.e. aliquid crystal cell). At this time, the liquid crystal layer 130 can beequivalent to a λ/2 retarder film. Subsequently, the circularlypolarized light rays can be transformed into linearly polarized lightrays by the first λ/4 retarder film 160, so as to allow the light raysto pass a transmission axis of the first polarizer 140. Therefore, withthe use of the λ/4 retarder films 160, 170, the polarized direction andangles of the light rays can be adjusted for enhancing the transmittanceof the liquid crystal display panel 100.

Referring to FIG. 6, a schematic diagram showing a pixel region of aliquid crystal display panel according to another embodiment of thepresent invention is illustrated. In another embodiment, thepredetermined angle θ (θ1, θ2, and θ3) between the trunk portion 124 andthe branch portions 225 may be greater than 45 degrees (θ>45°), such asin the range of 47.5 degrees to 85 degrees, for another example, in therange of 50 degrees to 80 degrees. At this time, the λ/4 retarder films160 and 170 are bonded to the outer surfaces of the first substrate 110and the second substrate 120, respectively, for adjusting polarizedangles of the light rays.

Referring to FIG. 4 again, similarly, when the predetermined angle θbetween the trunk portion 124 and the branch portions 225 is greaterthan 45 degrees, the angle between the absorption axes A of the firstpolarizer 140 and the second polarizer 150 is 90 degrees, and the anglebetween slow axes C of the λ/4 retarder films 160 and 170 is 90 degrees,wherein the angle between the axis C of the λ/4 retarder film 160 or 170and the absorption axis A of the polarizer 140 or 150 is 45 degrees.

In a further embodiment, the liquid crystal display panel may be, forexample, a PVA type liquid crystal display panel. At this time, thepolymer alignment layers may be omitted in the liquid crystal displaypanel.

As described above, in the LCD panel and the display apparatus of thepresent invention using the same, with the use of the pixel electrodestructure, the color shift problem of the VA type LCD apparatus can beimproved. For example, the pixel electrodes in the different pixelregions can have different predetermined angles (the angles between thetrunk portion and the branch portions). Moreover, the polarizeddirection and angles of the light rays can be adjusted by the λ/4retarder films for enhancing the transmittance of the liquid crystaldisplay panel. Therefore, in the LCD panel and the display apparatus ofthe present invention using the same, the color shift problem of the LCDpanel can be improved, and the transmittance thereof can be enhanced.

The present invention has been described with a preferred embodimentthereof and it is understood that many changes and modifications to thedescribed embodiment can be carried out without departing from the scopeand the spirit of the invention that is intended to be limited only bythe appended claims.

1. A liquid crystal display panel comprising: a first substratecomprising a first electrode; a second substrate comprising a secondelectrode, first pixel regions, second pixel regions and third pixelregions, wherein the second electrode has a pixel electrode structure,and the pixel electrode structure comprises a trunk portion andplurality of branch portions, and there is a first predetermined anglebetween the trunk portion and the branch portions in each of the firstpixel regions, and there is a second predetermined angle between thetrunk portion and the branch portions in each of the second pixelregions, and there is a third predetermined angle between the trunkportion and the branch portions in each of the third pixel regions, andthe first predetermined angle and the second predetermined angle areless than or greater than 45 degrees, and the first predetermined angleis different to the second predetermined angle, and the thirdpredetermined angle is different to the first predetermined angle andthe second predetermined angle; a liquid crystal layer formed betweenthe first substrate and the second substrate; a first polarizer disposedat an outer side of the first substrate; a second polarizer disposed atan outer side of the second substrate; a first quarter wave retarderfilm disposed between the first substrate and the first polarizer; and asecond quarter wave retarder film disposed between the second substrateand the second polarizer, wherein an angle between the slow axis of thefirst quarter wave retarder film and an absorption axis of the firstpolarizer is 45 degrees, and an angle between the slow axis of thesecond quarter wave retarder film and an absorption axis of the secondpolarizer is 45 degrees.
 2. The liquid crystal display panel accordingto claim 1, wherein the second substrate further comprises fourth pixelregions, and there is a fourth predetermined angle in the fourth pixelregions, and the fourth predetermined angle is different the firstpredetermined angle, the second predetermined angle and the thirdpredetermined angle.
 3. The liquid crystal display panel according toclaim 1, wherein the predetermined angle is in the range of 5 degrees to42.5 degrees.
 4. The liquid crystal display panel according to claim 3,wherein the predetermined angle is in the range of 10 degrees to 40degrees.
 5. The liquid crystal display panel according to claim 1,wherein the predetermined angle is in the range of 47.5 degrees to 85degrees.
 6. The liquid crystal display panel according to claim 5,wherein the predetermined angle is in the range of 50 degrees to 80degrees.
 7. The liquid crystal display panel according to claim 1,wherein an angle between slow axes of the first quarter wave retarderfilm and the second quarter wave retarder film is 90 degrees.
 8. Aliquid crystal display panel comprising: a first substrate comprising afirst electrode; a second substrate comprising a second electrode, firstpixel regions, and second pixel regions, wherein the second electrodehas a pixel electrode structure, and the pixel electrode structurecomprises a trunk portion and plurality of branch portions, and there isa first predetermined angle between the trunk portion and the branchportions in each of the first pixel regions, and there is a secondpredetermined angle between the trunk portion and the branch portions ineach of the second pixel regions, and the first predetermined angle andthe second predetermined angle are less than or greater than 45 degrees,and the first predetermined angle is different to the secondpredetermined angle; a liquid crystal layer formed between the firstsubstrate and the second substrate; a first polarizer disposed at anouter side of the first substrate; a second polarizer disposed at anouter side of the second substrate; a first quarter wave retarder filmdisposed between the first substrate and the first polarizer; and asecond quarter wave retarder film disposed between the second substrateand the second polarizer.
 9. The liquid crystal display panel accordingto claim 8, wherein the second substrate further comprises third pixelregions, and there is a third predetermined angle between the trunkportion and the branch portions in the third pixel regions, and thethird predetermined angle is different to the first predetermined angleand the second predetermined angle.
 10. The liquid crystal display panelaccording to claim 9, wherein the second substrate further comprisesfourth pixel regions, and there is a fourth predetermined angle in thefourth pixel regions, and the fourth predetermined angle is differentthe first predetermined angle, the second predetermined angle and thethird predetermined angle.
 11. The liquid crystal display panelaccording to claim 8, wherein the predetermined angle is in the range of5 degrees to 42.5 degrees.
 12. The liquid crystal display panelaccording to claim 11, wherein the predetermined angle is in the rangeof 10 degrees to 40 degrees.
 13. The liquid crystal display panelaccording to claim 8, wherein the predetermined angle is in the range of47.5 degrees to 85 degrees.
 14. The liquid crystal display panelaccording to claim 13, wherein the predetermined angle is in the rangeof 50 degrees to 80 degrees.
 15. The liquid crystal display panelaccording to claim 8, wherein an angle between slow axes of the firstquarter wave retarder film and the second quarter wave retarder film is90 degrees, and an angle between the slow axis of the first quarter waveretarder film and an absorption axis of the first polarizer is 45degrees, and an angle between the slow axis of the second quarter waveretarder film and an absorption axis of the second polarizer is 45degrees.
 16. A display apparatus comprising: a backlight module; and aliquid crystal display panel comprising: a first substrate comprising afirst electrode; a second substrate comprising a second electrode, firstpixel regions, and second pixel regions, wherein the second electrodehas a pixel electrode structure, and the pixel electrode structurecomprises a trunk portion and plurality of branch portions, and there isa first predetermined angle between the trunk portion and the branchportions in each of the first pixel regions, and there is a secondpredetermined angle between the trunk portion and the branch portions ineach of the second pixel regions, and the first predetermined angle andthe second predetermined angle are less than or greater than 45 degrees,and the first predetermined angle is different to the secondpredetermined angle; a liquid crystal layer formed between the firstsubstrate and the second substrate; a first polarizer disposed at anouter side of the first substrate; a second polarizer disposed at anouter side of the second substrate; a first quarter wave retarder filmdisposed between the first substrate and the first polarizer; and asecond quarter wave retarder film disposed between the second substrateand the second polarizer.